In this paper we introduce the notions of mean dimension and metric mean dimension for non-autonomous iterated function systems(NAIFSs for short)on countably infinite alphabets which can be regarded as generalizations...In this paper we introduce the notions of mean dimension and metric mean dimension for non-autonomous iterated function systems(NAIFSs for short)on countably infinite alphabets which can be regarded as generalizations of the mean dimension and the Lindenstrauss metric mean dimension for non-autonomous iterated function systems.We also show the relationship between the mean topological dimension and the metric mean dimension.展开更多
针对即将实施的新油耗测试循环,采用不同的浸车温度,在底盘测功机上对一台满足国六排放标准的车辆进行WLTC(World-wide Harmonized Light-duty Test Cycle,全球统一轻型车测试循环)油耗测试。重点分析了WLTC中第一阶段中决定待测车辆油...针对即将实施的新油耗测试循环,采用不同的浸车温度,在底盘测功机上对一台满足国六排放标准的车辆进行WLTC(World-wide Harmonized Light-duty Test Cycle,全球统一轻型车测试循环)油耗测试。重点分析了WLTC中第一阶段中决定待测车辆油耗的3种排气污染物二氧化碳、一氧化碳和未燃碳氢的排放。结果表明,随着测试循环的进行,车辆运行状况趋于稳定,不同浸车温度条件下排气污染物的生成量也趋于相近,不同浸车温度对二氧化碳、一氧化碳和未燃碳氢3种排气污染物以及油耗的影响差异主要体现在低速段,除此之外,相比于二氧化碳在整个低速段持续大量生成,一氧化碳和未燃碳氢则主要在冷启动后、测试循环开始20s左右达到峰值。研究发现,相同试验条件下,采用较高浸车温度(26℃)比采用较低浸车温度(23℃)更有利于轻型车在WLTC中的油耗测试。展开更多
文摘In this paper we introduce the notions of mean dimension and metric mean dimension for non-autonomous iterated function systems(NAIFSs for short)on countably infinite alphabets which can be regarded as generalizations of the mean dimension and the Lindenstrauss metric mean dimension for non-autonomous iterated function systems.We also show the relationship between the mean topological dimension and the metric mean dimension.
文摘针对即将实施的新油耗测试循环,采用不同的浸车温度,在底盘测功机上对一台满足国六排放标准的车辆进行WLTC(World-wide Harmonized Light-duty Test Cycle,全球统一轻型车测试循环)油耗测试。重点分析了WLTC中第一阶段中决定待测车辆油耗的3种排气污染物二氧化碳、一氧化碳和未燃碳氢的排放。结果表明,随着测试循环的进行,车辆运行状况趋于稳定,不同浸车温度条件下排气污染物的生成量也趋于相近,不同浸车温度对二氧化碳、一氧化碳和未燃碳氢3种排气污染物以及油耗的影响差异主要体现在低速段,除此之外,相比于二氧化碳在整个低速段持续大量生成,一氧化碳和未燃碳氢则主要在冷启动后、测试循环开始20s左右达到峰值。研究发现,相同试验条件下,采用较高浸车温度(26℃)比采用较低浸车温度(23℃)更有利于轻型车在WLTC中的油耗测试。
